Nathan Giesselman advises public and private clients in a variety of internal and third-party transactions, with a particular focus on international planning for multinational clients; cross-border acquisition, disposition and restructuring transactions for both U.S. and international clients; and tax planning for private equity and hedge fund clients.


On the strength of his innovative work on behalf of clients, Mr. Giesselman was named a Tax Rising Star in 2016 and 2017 by Law360, which recognizes select attorneys under 40 who are distinguishing themselves in their areas of practice. In 2016, the Daily Journal also selected him as one of its Top 40 Under 40, an annual list of the “rising star” California attorneys who are engaging in impactful, high-level work.

Significant representations include:

  • Intel Corporation in its $15.3 billion acquisition of Mobileye, N.V. and in its $4.2 billion joint venture with TPG Capital, L.P. to form the independent cybersecurity company McAfee;
  • E.I. du Pont de Nemours and Company in its:
    • $130 billion merger-of-equals with The Dow Chemical Company. This deal was awarded the Americas M&A Deal of the Year at the 2016 International Tax Review Americas Awards;
    • sale of a portion of its crop protection business to FMC Corporation;
    • $7.4 billion acquisition of Danisco; and
    • $4.9 billion sale of DuPont Performance Coatings; its spin-off of The Chemours Company and various debt offerings;
  • Broadcom Corporation in its $37 billion acquisition by Avago Technologies Limited. Mr. Giesselman was a key member of the team recognized by the Daily Journal with a 2016 California Lawyer Attorneys of the Year award for innovative work on this deal, which also was named the Americas Technology and Telecom Tax Deal of the Year at the 2016 International Tax Review Americas Awards;
  • Hewlett Packard Enterprise Company in the spin-off of its enterprise services business and its merger with Computer Sciences Corp., as well as the spin-off of its software business and its combination with Micro Focus International plc;
  • Cavium, Inc. in its $1.4 billion acquisition of QLogic Corp. and in its pending $6 billion acquisition by Marvell Technology Group Ltd.;
  • Hewlett-Packard Co. in the tax aspects of its separation into two companies, Hewlett Packard Enterprise Company and HP Inc.;
  • Visa Inc. in the tax aspects of its $23.4 billion acquisition and integration of Visa Europe Limited;
  • Pfizer Inc. in its integration of Wyeth and its initial public offering of Zoetis Inc.;
  • Activision Blizzard, Inc. in its $5.8 billion repurchase of shares from Vivendi;
  • Nokia Corporation in the $7.2 billion sale of its devices and services business to Microsoft Corporation;
  • The Sage Group plc in its $850 million acquisition of Intacct Corporation;
  • United Talent Agency in its acquisition of a stake in Core Media Group and its acquisitions of AGM Securities and Greater Talent Network;
  • Revlon, Inc. in its $660 million acquisition of The Colomer Group;
  • Permira Funds in its $1.1 billion sale of Renaissance Learning Inc.;
  • SanDisk Corporation in its $19 billion acquisition by Western Digital Corporation and its $1.1 billion acquisition of Fusion-io;
  • BTG Pactual in a 2010 $1.8 billion investment by various sovereign wealth and private equity funds, its 2012 initial public offering and various debt offerings;
  • Lattice Semiconductor Corporation in its $600 million acquisition of Silicon Image, Inc.;
  • United Online, Inc. in its spin-off of FTD Companies, Inc.;
  • Och-Ziff Capital Management Group, LLC in its restructuring and initial public offering, and 2011 follow-on offering; and
  • repatriation and integration planning for various Fortune 100 companies.

Mr. Giesselman also has represented U.S. and international investment banking clients on complex structured transactions and proprietary trades. Mr. Giesselman has been published in Tax Notes and CCH International Tax Journal.



  • J.D., Columbia Law School, 2006 (Kent Scholar)
  • B.S., State University of New York, Albany, 2003 (summa cum laude)


  • California
  • New York